Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.
Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.
Meat Sci. 2021 Sep;179:108532. doi: 10.1016/j.meatsci.2021.108532. Epub 2021 May 2.
We evaluated maternal undernutrition effects induced by a lower natural pasture allowance (gestation days 30-143) on histological-biochemical and meat traits in muscles Semitendinosus, cranial Gluteobiceps and Supraspinatus from 200-day old male and female lambs. Maternal undernutrition increased oxidative and reduced glycolytic fibers in all muscles (P ≤ 0.01). Maternal undernutrition reduced the diameter of glycolytic fibers in the cranial Gluteobiceps of exclusively female lambs (P = 0.05) and reduced the diameter of oxidative fibers in the Supraspinatus of exclusively male lambs (P = 0.02). Maternal undernutrition increased lipid content in the Supraspinatus of females (P = 0.001), reduced lactate content (P = 0.03) and WB shear force (P = 0.02) in the Semitendinosus of females, and increased cooking losses in the Semitendinosus of males (P = 0.0069). In conclusion, gestational nutrient restriction induced fetal programming effects on muscle characteristics of lambs. Moreover, our study demonstrates that maternal undernutrition influences muscle and meat characteristics in a sex and muscle-dependent way.
我们评估了妊娠 30-143 天低天然牧场供给量导致的母体营养不足对 200 日龄雄性和雌性羔羊半腱肌、颅侧臀中肌和冈上肌的组织生化和肉质特性的影响。母体营养不足增加了所有肌肉中的氧化纤维和减少了糖酵解纤维（P≤0.01）。母体营养不足减少了雌性羔羊颅侧臀中肌中糖酵解纤维的直径（P=0.05），减少了雄性羔羊冈上肌中氧化纤维的直径（P=0.02）。母体营养不足增加了雌性羔羊冈上肌中的脂质含量（P=0.001），减少了雌性羔羊半腱肌中的乳酸含量（P=0.03）和 WB 剪切力（P=0.02），并增加了雄性羔羊半腱肌中的蒸煮损失（P=0.0069）。总之，妊娠期营养限制对羔羊肌肉特性产生了胎儿编程效应。此外，我们的研究表明，母体营养不足以性别和肌肉依赖的方式影响肌肉和肉质特性。
